Re: Constraint comparing blanks. -- MIDRANGE-L

Charles,
Just to be clear...

You are saying that NAME = '' and NAME = '' will not pick up
'THOMAS' as a valid match. I hope that is what you are saying :D
Otherwise I'll have a very interesting day of parnoid double checking a
bunch of sql statements ;)

Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777

Charles Wilt <charles.wilt@xxxxxxxxx>
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04/09/2010 08:32 AM
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Re: Constraint comparing blanks.

Bryce,

I was thinking Alan's issue might be related to '' vs. ' '....

So I tried it both ways. Both cases work the same.

I'd say either Alan is missing a PTF or his Check constraint isn't
defined like he thinks it it.

The only way I could get THOMAS to not work was to have a
constraint (fld1 not like ' %' )

Charles

On Fri, Apr 9, 2010 at 8:23 AM, Bryce Martin <BMartin@xxxxxxxxxxxx> wrote:

Maybe I'm missing something, but wouldn't you just do NAME <> '';

No space inside. Then won't it look to see if the value you are

comparing

to is empty(all blanks)? That is how I do it in my sql statements....
then again, our text fields don't usually start with a blank so maybe I
have potential bugs all over the place.

Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777

Alan Campin <alan0307d@xxxxxxxxx>
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04/08/2010 07:38 PM
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Subject
Constraint comparing blanks.

When you are declare DDL for an SQL defined table we use a lot of stuff
like
this

NAME <> ' ';

I would have thought that this would expand to be compare say 10 char

name

to 10 char blank but I saw today that is not true.

If you have the following in a field name the test will fail because it
only
looks at the first character.

THOMAS where is a blank.

What is the correct way to declare this test? In RPG you have a *ALL' '
but
not in SQL.

You surely don't want to code

NAME <> ' '

I know there has to be a simple way to do it. Just can't think of it off
the
top of my head.
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